Bestop 90034-35 Black Diamond Duster Deck Cover Extension for 2007-2017 Wrangler Unlimited Extension fabric to completely cover full cargo area of Wrangler JK Unlimited Matching fabric to Duster Deck Cover for this vehicle Utilizes Bestop BeltRail channel system for a tight, secure fit Premium soft top fabric for color-matched coordination with other accessories Must be used with Windjammer P/N 80039-35 to install